Hi,
Please try to add this in Actionscript of your search textfield->go to your search element->Advanced->Actionscript->check Custom->check Change->Create code framework and put this:
function ff_NAMEOFTEXTFIELD_action(element, action)
{
jQuery('[name="ff_nm_NAMEOFSELECTLIST[]"] option').prop('hidden', false);
jQuery('[name="ff_nm_NAMEOFSELECTLIST[]"] option').not(jQuery('[name="ff_nm_NAMEOFSELECTLIST[]"] option:icontains('+element.value+')')).prop('hidden', true);
} // ff_NAMEOFTEXTFIELD_action
jQuery.expr[':'].icontains = function(a, i, m) {
return jQuery(a).text().toUpperCase()
.indexOf(m[3].toUpperCase()) >= 0;
};
Please replace:
-NAMEOFTEXTFIELD with name of your textfield for search (not title).
-NAMEOFSELECTLIST with name of your selectlist (not title).
Let me know if it works for you.
Regards,
Tihana